For the past few years I am using a BSNL sim. I am a guy who uses social networks and lot of other stuff on internet. The speed provided by BSNL is very poor that I bought a airtel sim to use internet.
Speed is not only my problem, but it couldn't provide signal inside my home. Whenever I change network speed to '3G only', my phone picks up no signal which ends up in more issues. I couldn't even call as there is no signal. So I usually setup the speed to 2G or 3G. Then it only receives 2G signal which end up in low speed. Other companies are now on their run to activate 5G where I was stuck here with 2G speed.